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Add dielectric pbrt material

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This commit is contained in:
hal8174 2025-08-28 00:22:58 +02:00
parent 0480e041cd
commit 2269bd102d
Signed by: hal8174
SSH key fingerprint: SHA256:NN98ZYwnrreQLSOV/g+amY7C3yL/mS1heD7bi5t6PPw
5 changed files with 43 additions and 27 deletions
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15
ray-tracing-core/src/math/material.rs Normal file
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@ -0,0 +1,15 @@
use crate::prelude::*;
pub fn fresnel_real(cos_theta_in: Float, nu1: Float, nu2: Float) -> Float {
let nu_rel = nu1 / nu2;
let cos_theta_tr = Float::sqrt(1.0 - nu_rel * nu_rel * (1.0 - cos_theta_in * cos_theta_in));
let rs = ((nu1 * cos_theta_in - nu2 * cos_theta_tr)
/ (nu1 * cos_theta_in + nu2 * cos_theta_tr))
.powi(2);
let rp = ((nu1 * cos_theta_tr - nu2 * cos_theta_in)
/ (nu1 * cos_theta_tr + nu2 * cos_theta_in))
.powi(2);
0.5 * (rs + rp)
}

1
ray-tracing-core/src/math/mod.rs
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@ -1,6 +1,7 @@
pub mod dir3;
pub mod frame;
pub mod mat3;
pub mod material;
pub mod pos3;
pub mod sampling;